Recently, the "Cangyuan" shield machine, developed by CCCC, set a new record for the largest diameter of a China-produced shield machine. The 16.66-meter diameter "Cangyuan" was unveiled at CCCC's manufacturing center in Changshu, Jiangsu. This marks the second record set by CCCC, following the 16.07-meter diameter "Yun He" shield machine.

With an overall length of 176 meters and a total weight exceeding 5,650 tons, the "Cangyuan" will be used in the construction of the Haitai Yangtze River Tunnel, the world’s longest underwater highway tunnel.

Equipped with an intelligent system, the "Cangyuan" addresses the challenges of difficult machine maintenance and high labor risks. Its cutterhead is designed to efficiently excavate through strata with up to 65% quartz sand content, enabling continuous tunneling for 2,000 meters without cutter changes. Additionally, it features the world’s first intelligent system with active protection capabilities, which effectively prevents tunnel water ingress and ensures construction precision within millimeter-level tolerances.